Background: The lack of specific vaccines or drugs against coronavirus disease 2019
(COVID-19) warrants studies focusing on alternative clinical approaches to reduce the …

We explored whether influenza vaccination (IV) affects susceptibility to SARS-CoV-2
infection and clinical outcomes in COVID-19 patients in 17,608 residents of the Italian …

It has been proposed that vaccines may exert an unspecific protective effect against
infectious agents, different than expected. Coronavirus disease 2019 (COVID-19) is a …

Influenza could circulate in parallel with COVID-19. In the context of COVID-19, some
studies observed inverse associations between influenza vaccination and SARS-CoV-2 …

In recent months, there has been much hype in newspapers and on social media (although
less so in the scientific community) regarding an alleged association between influenza …

We reviewed the association between seasonal influenza vaccination and the risk of SARS-
CoV-2 infection or complicated illness or poor outcome (eg, severe disease, need for …

The last 2019/20 northern hemisphere influenza season overlapped with the first wave of
coronavirus disease 2019 (COVID-19) pandemic. Italy was the first western country where …

Introduction Recent evidence suggests that influenza vaccination may offer protection
against COVID-19 severity. Our aim was to quantify the association between influenza …

Background With a unique influenza season occurring in the midst of a pandemic, there is
interest in assessing the role of the influenza vaccine in COVID-19 susceptibility and …

Objective To estimate associations between trivalent influenza vaccination and COVID-19
mortality as well as severe clinical outcomes among hospitalised patients. Design …